Thomas fleetwood



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Letters Patent No. 61,062, dated January 8, 1867.

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TO ALL WHOM T MAY CONCERN:

Be it known that I, THOMAS FLEnrwooD, of St. John, New Brunswick, have inrented a new and improvedv Selt`-Rendcring Tallow Cup; andI do herebydeclare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had lto the accompanying drawings, forming part oi this specification, in which- Figure 1 is a longitudinal section taken in the line a: fr, fig. 2.

Figure 2 is a plan or top View of the tallow cup'.

Similar letters of reference indicate like parts. l

This invention is designed to obviate the well-known objection to the use of tallow for lubricating steam cylinders, on account oi the gummy matter which accumulates and clogs the action of the piston', even when it has been previously tried out. It consists of a cup for holding raw tallow, which is enclosed in a brass or other metal chamber, to be connected with the steam cylinder in such manner that the tallow in the internal cup shall be melted and fed regularly and gradually into the cylinder. The tallow is placed in the cup in its raw state, and is thus rendered or tried out by the heat of the steam, and only the pure grease passes into the cylinder. By mans of a stop-cock the supply of melted tallow is regulated; no more is admitted into the cylinder than is necessary for lubrication, and no guinmy matter is formed; besides the advantageous eil'ect in the better working of the piston, there is a great saving of material.

Figure 1 represents a cylindrical metal cup, a a being the body of the cup, which is connected at the bottom part with a stem, I), screwed into it, through which a channel, c c, passes from the interior of the cup. The stern b has a screw on the end to fasten it to a steam cylinder, and is provided with a stop-cock, d. A cover, c, is fitted steam-tight in a seat like a Iioppet-'v'alve on the top of the cup a a; it is held firmly in place by a setscrew,f, ruiming through a cross-bar, g, which is pivotcd to the sides of the cock a a, and swings upon it like a bail on a water pail. A tin cup, h, is fitted within the cup t a, for holding the raw tallow. The bottom is perforated with one or more holes for thc escape of the melted tallow. On the top of the cover c is a stud or boss, t', for lifting it with. When the tallow cup is attached to a cylinder the internal cup ,7i is filled with raw tallow and the cover e fastened down tight in its scat by the sct-screwf. The stopecock d is opened to admit the melted 'tallow through the channel c; c into#I the cylinder, and is allowed to remain open, say for fifteen or' twenty minutes, or until the cylinder is well lubricated; it is then closed for two or three hours, or until theI cylinder again requires lubrication. Attention on the part of an engineer in opening and closing the stop-cock to admit or cut off the supply of the melted tallow as needed, is all that is necessary for keeping a steam cylinder entirely free of gum and in perfect working order by this method of lubricating with raw tallow.

Having described the construction and operation of my invention, what Iclaim as new, and desire to secure by Letters Patent, is-

Aself-rendering tallow cup for lubricating steam engines, constructed and operated substantially in the manner herein described.

' THOMAS FLEETWOOD.

Witnesses:

GEORGE OXLEYAHUEs'rIs, EDWARD D. Genn. 

